‘My generation have deluded themselves’: ex-Vampire Weekender Rostam …

The first song Rostam Batmanglij ever learned to play on guitar was Chuck Berry’s Johnny B Goode, the quintessentially American rock’n’roll hit about being an American rock’n’roll star. “It doesn’t get more American than that,” he says, with a smile.

The 42-year-old superproducer (Frank Ocean, Charli xcx, Carly Rae Jepsen) and former Vampire Weekend member is sitting across from…